/* ─────────────────────────────────────────
   CSS CUSTOM PROPERTIES / TOKENS
───────────────────────────────────────── */
:root {
    --bg: #0d0d0f;
    --bg-secondary: #141418;
    --bg-card: #1a1a20;
    --border: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(255, 255, 255, 0.15);
    --fg: #f0f0f2;
    --fg-muted: #888899;
    --fg-subtle: #555566;
    --accent: #a78bfa;
    --accent-hover: #c4b5fd;
    --accent-glow: rgba(167, 139, 250, 0.25);
    --badge-bg: rgba(167, 139, 250, 0.12);
    --radius-outer: 2rem;
    --radius-inner: 1.75rem;
    --shadow-card: 0 32px 80px rgba(0, 0, 0, 0.5);
    --font: 'Inter', system-ui, sans-serif;
    --transition: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="light"] {
    --bg: #f6f6fa;
    --bg-secondary: #ededf3;
    --bg-card: #ffffff;
    --border: rgba(0, 0, 0, 0.07);
    --border-strong: rgba(0, 0, 0, 0.14);
    --fg: #0d0d0f;
    --fg-muted: #666677;
    --fg-subtle: #999aaa;
    --accent: #7c3aed;
    --accent-hover: #6d28d9;
    --accent-glow: rgba(124, 58, 237, 0.18);
    --badge-bg: rgba(124, 58, 237, 0.08);
    --shadow-card: 0 32px 80px rgba(0, 0, 0, 0.12);
}

/* ─────────────────────────────────────────
   RESET & BASE
───────────────────────────────────────── */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font);
    background-color: var(--bg);
    color: var(--fg);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color 0.4s ease, color 0.4s ease;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: inherit;
}

button {
    cursor: pointer;
    font-family: var(--font);
}

img,
video {
    display: block;
}

.hidden {
    display: none !important;
}

/* ─────────────────────────────────────────
   CANVAS
───────────────────────────────────────── */
#arrowCanvas {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 999;
}

/* ─────────────────────────────────────────
   NAVIGATION
───────────────────────────────────────── */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 0 1.5rem;
}

.navbar {
    max-width: 900px;
    margin: 1.25rem auto 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(var(--bg-rgb, 13, 13, 15), 0.6);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: 9999px;
    padding: 0.6rem 0.7rem 0.6rem 1.4rem;
    transition: var(--transition);
}

[data-theme="light"] .navbar {
    background: rgba(246, 246, 250, 0.7);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1rem;
    letter-spacing: -0.02em;
    color: var(--fg);
    white-space: nowrap;
}

.logo-dot {
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    display: inline-block;
    box-shadow: 0 0 8px var(--accent-glow);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    list-style: none;
}

.nav-link {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--fg-muted);
    padding: 0.45rem 0.9rem;
    border-radius: 9999px;
    transition: color var(--transition), background var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--fg);
    background: var(--border);
}

.nav-link.nav-cta-small {
    background: var(--accent);
    color: #fff;
    padding: 0.5rem 1.1rem;
    font-weight: 600;
}

.nav-link.nav-cta-small:hover {
    background: var(--accent-hover);
    color: #fff;
}

/* Mobile hamburger */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    padding: 0.4rem;
    border-radius: 0.5rem;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--fg-muted);
    border-radius: 2px;
    transition: var(--transition);
}

/* ─────────────────────────────────────────
   HERO SECTION
───────────────────────────────────────── */
.hero-section {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 4rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 8rem 2rem 4rem;
}

/* ─────────────────────────────────────────
   HERO TEXT
───────────────────────────────────────── */
.hero-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--accent);
    background: var(--badge-bg);
    border: 1px solid rgba(167, 139, 250, 0.2);
    padding: 0.35rem 0.9rem;
    border-radius: 9999px;
}

.badge-dot {
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.5;
        transform: scale(0.8);
    }
}

.hero-heading {
    font-size: clamp(2.4rem, 5vw, 4rem);
    font-weight: 900;
    letter-spacing: -0.04em;
    line-height: 1.0;
    color: var(--fg);
}

.heading-accent {
    background: linear-gradient(135deg, var(--accent) 0%, #60a5fa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-tagline {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--fg-muted);
    line-height: 1.65;
    font-weight: 400;
}

/* ─────────────────────────────────────────
   CTA BUTTON (Arrow Target)
───────────────────────────────────────── */
.cta-button {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--fg);
    background: transparent;
    border: 1.5px solid var(--border-strong);
    border-radius: 9999px;
    padding: 0.85rem 1.8rem;
    transition: border-color var(--transition), color var(--transition),
        background var(--transition), box-shadow var(--transition),
        transform var(--transition);
    overflow: hidden;
    letter-spacing: -0.01em;
}

.cta-button::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--accent-glow), transparent);
    opacity: 0;
    transition: opacity var(--transition);
    border-radius: inherit;
}

.cta-button:hover {
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-glow), 0 8px 32px var(--accent-glow);
    transform: translateY(-2px);
}

.cta-button:hover::before {
    opacity: 1;
}

.cta-button:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 4px;
}

.cta-icon {
    width: 18px;
    height: 18px;
    transition: transform var(--transition);
}

.cta-button:hover .cta-icon {
    transform: translateX(3px);
}

/* Arrow target indicator — glows when arrow is near */
.cta-button.arrow-near {
    border-color: var(--accent);
    box-shadow: 0 0 0 6px var(--accent-glow), 0 8px 40px var(--accent-glow);
}

.scroll-hint {
    font-size: 0.75rem;
    color: var(--fg-subtle);
    letter-spacing: 0.02em;
    animation: fadeInUp 1s ease 1s both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(8px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ─────────────────────────────────────────
   MEDIA PREVIEW CARD
───────────────────────────────────────── */
.preview-outer {
    position: relative;
    border-radius: var(--radius-outer);
    border: 1px solid var(--border);
    padding: 0.6rem;
    background: var(--bg-card);
    box-shadow: var(--shadow-card);
    transition: box-shadow var(--transition), transform var(--transition);
}

.preview-outer:hover {
    transform: translateY(-4px);
    box-shadow: 0 48px 100px rgba(0, 0, 0, 0.6), 0 0 0 1px var(--border-strong);
}

.preview-inner {
    position: relative;
    border-radius: var(--radius-inner);
    overflow: hidden;
    aspect-ratio: 16 / 10;
    background: #000;
}

.preview-image {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: opacity 0.5s ease, transform 0.6s ease;
    will-change: transform;
}

.preview-outer:hover .preview-image {
    transform: scale(1.03);
}

.preview-image.fading {
    opacity: 0;
}

.preview-sequence {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 0.5s ease;
    z-index: 1;
}

.preview-sequence.visible {
    opacity: 1;
}

.preview-sequence img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transform: scale(1.06);
    transition: opacity 1s ease, transform 7s cubic-bezier(.2,.65,.2,1);
}

.preview-sequence img.active {
    opacity: .86;
    transform: scale(1);
}

/* Play button */
.play-btn {
    position: absolute;
    bottom: 1.25rem;
    left: 1.25rem;
    z-index: 10;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    background: none;
    border: none;
    padding: 0;
}

.play-btn-glass {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 50%;
    color: #fff;
    transition: background var(--transition), transform var(--transition);
    flex-shrink: 0;
}

.play-btn:hover .play-btn-glass {
    background: rgba(255, 255, 255, 0.28);
    transform: scale(1.1);
}

.play-btn:focus-visible .play-btn-glass {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

.play-icon,
.pause-icon {
    width: 18px;
    height: 18px;
}

.play-label {
    font-size: 0.78rem;
    font-weight: 600;
    color: #fff;
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.5);
    letter-spacing: 0.02em;
    white-space: nowrap;
}

/* Video progress */
.video-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: rgba(255, 255, 255, 0.15);
    z-index: 10;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.video-progress.active {
    opacity: 1;
}

.video-progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent), #60a5fa);
    border-radius: 0 2px 2px 0;
    transition: width 0.25s linear;
}

/* Frame decoration dots */
.frame-dots {
    position: absolute;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border-strong);
}

.frame-tl {
    top: 0.35rem;
    left: 0.35rem;
}

.frame-tr {
    top: 0.35rem;
    right: 0.35rem;
}

.frame-bl {
    bottom: 0.35rem;
    left: 0.35rem;
}

.frame-br {
    bottom: 0.35rem;
    right: 0.35rem;
}

/* ─────────────────────────────────────────
   THEME TOGGLE
───────────────────────────────────────── */
.theme-toggle {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 200;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border-strong);
    border-radius: 50%;
    color: var(--fg-muted);
    transition: color var(--transition), background var(--transition),
        border-color var(--transition), transform var(--transition);
}

.theme-toggle:hover {
    color: var(--fg);
    border-color: var(--accent);
    transform: rotate(20deg) scale(1.08);
}

.sun-icon,
.moon-icon {
    width: 18px;
    height: 18px;
}

/* ─────────────────────────────────────────
   ENTRANCE ANIMATIONS
───────────────────────────────────────── */
.hero-badge,
.hero-heading,
.hero-tagline,
.cta-button,
.scroll-hint,
.preview-outer {
    animation: heroFadeUp 0.8s ease both;
}

.hero-heading {
    animation-delay: 0.1s;
}

.hero-tagline {
    animation-delay: 0.2s;
}

.cta-button {
    animation-delay: 0.3s;
}

.scroll-hint {
    animation-delay: 0.5s;
}

.preview-outer {
    animation-delay: 0.15s;
}

@keyframes heroFadeUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ─────────────────────────────────────────
   RESPONSIVE — TABLET
───────────────────────────────────────── */
@media (max-width: 900px) {
    .hero-section {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto;
        gap: 3rem;
        padding: 7rem 1.5rem 3rem;
    }

    .hero-text {
        align-items: center;
        text-align: center;
    }

    .hero-tagline .tagline-br {
        display: none;
    }

    .preview-outer {
        width: 100%;
        max-width: 600px;
        margin: 0 auto;
    }
}

/* ─────────────────────────────────────────
   RESPONSIVE — MOBILE
───────────────────────────────────────── */
@media (max-width: 600px) {
    .navbar {
        flex-wrap: wrap;
        border-radius: 1.25rem;
        padding: 0.75rem 1rem;
        gap: 0.5rem;
    }

    .nav-toggle {
        display: flex;
        margin-left: auto;
    }

    .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        gap: 0.25rem;
        padding-top: 0.5rem;
        border-top: 1px solid var(--border);
    }

    .nav-links.open {
        display: flex;
    }

    .nav-link {
        width: 100%;
        text-align: center;
        padding: 0.6rem 1rem;
        border-radius: 0.75rem;
    }

    .hero-section {
        padding: 6rem 1rem 2rem;
        gap: 2.5rem;
    }

    .hero-heading {
        font-size: clamp(2rem, 8vw, 2.8rem);
    }

    .play-btn-glass {
        width: 38px;
        height: 38px;
    }

    .play-label {
        display: none;
    }
}